sheets



(No Model.)

PUMP.'

Patented Sept. v27, 1881.

n V INVENTOR ATTORNYS 4 WlTNEssEs l UNITED STATES PATENT OFFICE.

` ABNER T. SHEETS, OF BRIDGrFV'ATER,` VIRGINIA.

PUMP.

SPECIFICATION forming part of Letters Patent No. 247,696, dated September 27, 1881'.

' Application inea April 16,1881. (No model.)

To all whom it may concern Be it known that I, ABNER T. SHEETS, a citizen of the United States, resident at Bridgewater, in the county of Rockingham and State of Virginia, have invented certain new and useful Improvements in Pumps; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and llse the same, reference being had to the accompanying drawings, and to letters or iigures of reference marked thereon, which form a part of this specification.

Figure l is avertical section. Fig. 2 is a detail, and Fig. 3 is a detail view of the flattened flaring inlet.

This invention has relation to double-acting pumps; and it consists in the improved features of construction and combination hereinafter fully described, and particularly pointed out in the claim.

Referring by letter to the accompanying drawings, A designates the cylinder, having its upper head, B, provided with the collar C. This collar is internally threaded, and a hollow screw, D, having a transversely-grooved head, through which the piston-rod passes, is seated in this collar, and is longer than the collar, as shown. The lower head of the cylinder A is provided with an upwardly-flaring flattened inlet, E, which connects with the suction-pipe, and has a branch pipe, F, extending up outside of the cylinder A and connecting with an elbow, Gr, curved, as shown, at the top of the cylinder and at one side ofthe same. The bottom of the cylillder is provided with a valve, H, opening upwardly. The upper end of the branch pipe F is provided with a valve, I, also opening upwardly. At the opposite side of the cylinder A, near its lower end, is all e1- bow, J, opening illto the cylinder, and from this leads a branch or side pipe, K,which forms part of the educt L.

A valve, M, is located at the junction of the elbowJ and the branch pipe K. Opposite the elbow Gr the cylinder A opens into the educt L, and is provided with a valve, N, openin upwardly.

It will be noticed that all the valves in this pump are on a horizontal plane, while heretofore in this 'class of pumps the valves have been suspended vertically, and the result of such suspension has been that cross-currents of the water have been produced, and the friction of the pump is so great as to cause the pump to work very hard.

In my pump the piston or plunger O is constructed of two disks, a a', having annular i The rear faces of theprojecting edges of the disks a a are preferably rounded, to prevent too rapid wear oi' the leatherwashers, and in fact this rounding of the rear faces of these projections causes the usefulness of the washers to be maintained for a great length of time. The reason for projecting the washers beyond the disks a a. is to cause the washers to always bear against the walls of the cylinder.

The educt-pipe is provided with the usual air-chamber, Q. R is the handle, pivoted in a standard, S, rising from the educt-pipe, and pivoted also to the upper end of the piston-rod P. A pin, T, is passed through the piston-rod P above the hollow screw D. The object of this pin is to permit the piston-rod P to be employed to tighten the screw, when it has becolne worn by use, by disconnecting the handleI from its standard, lowering the piston until the pin enters the groove in the head of the screw D, and by using the handle as a lever turn and tighten the screw in its seat.

The circumstances under which the screw becomes worn are as follows: The piston-rod passing up and down through the hollow screw jars the same in its seat, and in time the threads in the seat become worn. It is then necessary to drive the screw farther down in its seat, which is doneinthe manner above described. This is advantageous, for the reason that the cylinder isbelow the platform U, and to tighten it otherwise would require the removal of one or more boards, and would be even then attended with difficulty.

With refereuceto the cross-currents heretofore mentioned, they occur in other pl1mps,-for the reason that in most, if not all, of them, the majority, in fact, nearly all, of the valves are suspended vertically, and the water, in passing IOO through, is caused to iiowor is forced in a horizontal direction, while the obj ect is to get them to the point of discharge as directly as possible and with the least friction and exertion attainable.

Let the cylinder A be filled with water. A downward stroke of the piston will force the water up through the branch pipe K into the educt, and the water from the suction-tube will ow through the branch pipe F and lill the vacuum above the piston. An upward stroke will close the valves I and M and open the other valves. The curves of the pipes and elbows are such that the water has as nearly as possible au upward direction, and no cross currents are induced, whereby the friction is lessened,l and consequently less force is required to operate the pump.

A. T. SHEETS.

llfitnesses:

' PHILIP C. MASI, THEO. MUNGEN. 

